Bottom portion of a motor vehicle body



FIG. 1 is a left, front perspective view of a bottom portion of a motor vehicle body showing my new design;

FIG. 2 is a right, rear perspective view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a left side view thereof; and,

FIG. 7 is a top view thereof. 

CLAIM The ornamental design for a bottom portion of a motor vehicle body, as shown and described. 